CN1217196C - Sensitive detector for automatically regulating band width of oscillograph and method of detecting - Google Patents
Sensitive detector for automatically regulating band width of oscillograph and method of detecting Download PDFInfo
- Publication number
- CN1217196C CN1217196C CN011338334A CN01133833A CN1217196C CN 1217196 C CN1217196 C CN 1217196C CN 011338334 A CN011338334 A CN 011338334A CN 01133833 A CN01133833 A CN 01133833A CN 1217196 C CN1217196 C CN 1217196C
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- China
- Prior art keywords
- detector
- oscillograph
- memory
- frequency response
- probe
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R13/00—Arrangements for displaying electric variables or waveforms
- G01R13/20—Cathode-ray oscilloscopes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
- G01R1/06788—Hand-held or hand-manipulated probes, e.g. for oscilloscopes or for portable test instruments
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
- G01R1/06766—Input circuits therefor
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Leads Or Probes (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
The invention involves storing information about the probe frequency response in the probe itself. The information preferably consists of a set of one or more characteristic frequency response data points. Each data point includes at least the gain of the probe at a given frequency. More preferably, each data point includes the complex transfer characteristic of a probe and optionally the complex output reflectivity of the probe and the frequency at which the data applies. A variable number of frequency points can be stored, as necessary, to adequately describe the probe's response. The probe also preferably stores a header containing the number of stored data points. The invention readily extends to probes having multiple gain settings or multiple bandwidth settings, by simply storing multiple sets of S21, S22 and F data. When the probe is attached to a scope, the scope reads the frequency response information from the probe in accordance with any suitable communications format and protocol. Using information about its own frequency response and input voltage standing wave ratio (VSWR), the scope undertakes to adjust its frequency response (by which is meant to add or subtract gain at high frequency), thereby compensating for the frequency response of the probe and optimizing overall system frequency response.
Description
Technical field
The present invention relates generally to be used for the sensitive detector equipment of oscillograph (scopes), more specifically to detector and based on the self-adjusting method that is used for the oscillograph bandwidth of the communication bandwidth technology of the detector that links to each other.
Background technology
Detector and oscillograph are turned round together reach optimization very difficult.Often with oscilloscope design definite for having-three dB bandwidth, and then design detector according to this oscillograph that uses.If identical-three dB bandwidth that detector has, so when detector links to each other with oscillograph, the system that includes the oscillograph and the detector that links to each other will have on the tip of detector and reduce considerable bandwidth when using individually than any one parts.
Because the bandwidth of probe tip often is unknown, just problem has appearred for the user.General settling mode be with probe designs for by peak regulation, it be 0dB just on oscillographic bandwidth like this, so when detector was connected with the oscillograph line, total system still had the bandwidth identical with oscillograph itself.Thereby regulate transient state and the frequency response and specific oscillograph optimum of detector, might make this detector be not suitable for the oscillograph of the model of other oscillograph-especially also do not design.For example, detector is inserted in the future the transient response that more at a high speed oscillograph may cause underdamp, because detector is to design than this response that decays of the oscillographic front end of low speed with supposition.Another kind of settling mode is to make oscillographic transient response underdamp, and the bandwidth at it just has enough surpluses to guarantee to be connected with the specific system bandwidth of detector like this.But this has occurred another problem again, when not using specific detector, can relate to and sacrifice stabilization time and noisiness.
Summary of the invention
The present invention utilizes such fact, and oscillographic front end generally has excessive HF range of adjustment (perhaps can be designed to like this), and when needs obtained suitable system responses, it can be used for making oscillographic frequency response automatically to reach peak value.Also can use detector/oscillograph of the TekConnect Probe Interface of the Tektronix company that utilizes existing assignee of the present invention Oregon Beaverton.TekConnect Probe Interface has utilized again and has been called as I
2The bus of C is supposed this is known.
On August 25th, 1987 is disclosed, and the denomination of invention that has transferred the Philips company (U.S.PhillipsCorporation) of the U.S. is 4689740 couples of I of U.S. Patent No. of " being used for the interconnective double bus system with clock line and data line in a plurality of base stations "
2The C bus is described and illustrates.Also can be disclosed referring on June 9th, 1987, and with the U.S. Patent No. 4672306 of the common denomination of invention of transferring the possession of of the present invention for " electron detector " with automatic read-out mark and state.Here this quotes the content that has merged these two patent disclosures.
In brief, the present invention relates to the storage of the frequency response information of detector self.This information preferably contains one or more characteristic frequency number of responses strong point by one group to be formed.At least comprise the gain of detector in each data point in given frequency.Preferably, each data point comprises multiple conversion characteristic (S21 in the accompanying drawing 2) of detector and the multiple output reflection (S22 in the accompanying drawing 2) of any detector, and the frequency at the contained place of data (F in the accompanying drawing 2).As required, thus a plurality of Frequency points that can storage change satisfy the response of describing detector.Detector is preferably stored the title of the data point that comprises a plurality of storages.By storing many group S21, S22 and data F simply, the present invention expands to the detector with a plurality of gain settings or the setting of a plurality of bandwidth at an easy rate.
When detector is connected with oscillograph, the frequency response information that oscillograph reads detector according to any suitable communication format and agreement.Utilize self frequency response information and standing wave ratio of input voltage (VSWR), oscillograph guarantees that its frequency response reaches peak value (mean at high frequency and increase more gain), thus the frequency response of compensation detector.
Therefore, the invention provides a kind of sensitive detector equipment that uses with oscillograph, this detector comprises: the housing that probe tip and the continuous electronic component with characteristic frequency response thereof are installed; Be positioned at the first memory of housing, described first memory is the tentation data of the description of this characteristic frequency response at least with processor readable format storage representation; And the interface between described first memory and oscillograph; The oscillograph that described first memory response cooperates with described detector sends described predetermined data by described interface to oscillograph; Wherein said tentation data comprises the complex data point, and the representative of each complex data point is in the frequency characteristic along described probe tip on the frequency of frequency spectrum regulation and continuous electronic component thereof; Wherein said probe tip and continuous electronic component thereof also comprise composite transferring characteristic and compound output emissivity, and wherein said tentation data is also represented the description of this composite transferring characteristic and this compound output reflection.
Described detector device also comprises: the controller that is positioned at oscillograph, described controller comprises a processor and a second memory, the oscillograph that the response of described processor cooperates with described detector, by the tentation data of described interface reception transmission and with identical content stores in described second memory.
Wherein said controller is adjusted the characteristic frequency response that oscillographic frequency response compensates described detector and continuous electronic component thereof after receiving and storing the tentation data of described transmission.
Wherein said controller sends the oscillograph frequency response to the user after receiving and storing the tentation data of described transmission.
Wherein said controller sends to the user by display.
Wherein said first memory is a ROM (read-only memory).
Wherein said first memory is also stored to contain at least with the processor readable format and is stored in the title that the complex data in the described first memory is counted out, and wherein said first memory also sent title by described interface to oscillograph before sending described tentation data by described interface.
Wherein said interface is synchronous and comprises a clock cable.
Perhaps, wherein said interface comprises the complex data signal wire that connects detector corresponding to plural number.Perhaps, described interface comprises a look-at-me line.
Wherein said interface comprises plural look-at-me line, and the described plural look-at-me line of each bar is corresponding to one of described complex data line.
Description of drawings
Fig. 1 is the detailed maps of detector device constructed in accordance, and the detector of sensitivity is connected with an oscillograph.
Fig. 2 is the data layout block scheme, wherein the detector frequency response information can be stored in the storer shown in the accompanying drawing 1 according to one embodiment of present invention.
Fig. 3 is the process flow diagram of the expression best approach of the present invention.
Embodiment
The embodiment of current the best according to the present invention, because it carries out simple, the detector 10 of sensitivity of the present invention is with independent data, for example its gain A is (perhaps in given frequency, in the simplest execution, only be its bandwidth), be stored in the ROM (read-only memory) 12 (ROM) in the detector housing 10a.Detector 10 is started working (for example it being connected with oscillograph 14), and detector 10 is by bit serial sync cap 16 and oscillograph 14 these data of exchange that are connected.Oscillograph 14 supposition based on one near the band data of 3GHz to 5GHz, the detector that the definitions of bandwidth of representative connects-the 2db gain, and according to adjusting its bandwidth from the band data of detector 10.
For example, given detector 10 can be stored it self 4GHz band data in ROM12.When oscillographic controller reads these data from ROM12, the bandwidth of 4GHz detector that its determine to connect at 3.5GHz between the 5GHz.In response to the data that read from the ROM of the detector that connected, oscillographic controller is its high-frequency gain raising+2db, and definite experience gain (a large amount of detectors obtains by detecting) compensates the frequency response of 4GHz Characteristics of detector well.Therefore, the present invention attempts when each detector is connected with oscillograph optimization system bandwidth automatically.
To those skilled in the art, obviously according to most preferred embodiment of the present invention, interface 16 comprises four identical bit serial channels.Therefore, the interface 16 of oscillograph 14 and coupling thereof can be supported four detectors the same with detector 10.Not shown in accompanying drawing 1 as can be known to those skilled in the art, monitor analog coaxial detector input signal cable and show selectively that by oscillograph 14 this point also is conspicuous to those skilled in the art.This common display represents that with 18 keyboard 20 is used for user's input.For example on display 18, oscillograph 14 is operationally passed on the characteristic frequency response to the user.It is the same with common oscillograph that oscillograph 14 can be regarded as, includes the controller 22 of processor 23 and storer 24.To specifically describe the novelty of controller below.
When detector 10 was connected with oscillograph 14, detector 10 was asserted an interruption on the look-at-me line of a part that constitutes interface 16.This asserts interruption whether to comprise machine readable memory, for example ROM12 by interface 16 inquiry detectors 10 with definite detector 10 then controller 22 responses.Detector 10 himself is that the detector with sort memory responds inquiry by discerning.This response order can be according to any suitable predetermined protocol, and preferably by the two-way bit serial data channel communication synchronous with clock signal 30.Controller 22 reads the characteristic frequency response data of storage by identical synchronization bit serial data channels from the particular address of ROM12 then, and the data that read are deposited in the storer 24 of oneself.
Obviously be stored in the frequency response data that also has oscillograph oneself in the storer 24.Based on oscillographic frequency response characteristic and its frequency response characteristic, the frequency response that controller 22 is automatically adjusted oscillograph self compensates detector 10, the characteristic frequency of probe tip 10b and the electronic component 10c that links to each other with it response just.This adjustment can relate to makes oscillograph 14 reach peak value, be appreciated that to comprise by specified number or amount, for example+and 1db or more number, improve oscillographic high-frequency gain.To one skilled in the art, obvious this adjustment also can be to reduce oscillographic high-frequency gain to substitute its rising.No matter this adjustment raises or reduces, and can realize by corresponding techniques, and as by utilizing extra high frequency setting range, this is the known characteristic of oscillograph that is considered to common.
Accompanying drawing 2 expressions can be supported the optimum data storage organization of the ROM12 part of complex data point, and all complex data points that wherein compile are described the frequency response characteristic of detector 10.To one skilled in the art, obviously within the spirit and scope of the present invention, any suitable data structure all is possible.Accompanying drawing 2 each n detector data group of expression comprise that preferably a composite transferring performance data S21a, compound output reflection data S22a and S21a and S22a apply the frequency Fa at place.Accompanying drawing 2 expressions comprise n class data inlet, specify each inlet by inferior, and to one skilled in the art, obviously n can be any required integer.
Accompanying drawing 3 is process flow diagrams of an expression best approach of the present invention, automatically adjusts the detector that oscillographic frequency response adapts to connection by it.Method of the present invention comprises providing and has for example detector of a ROM storer, is that the tentation data of the frequency response of probe tip and continuous electron component characteristic thereof is described at least with processor readable form storage representation.100 these steps of expression of accompanying drawing 3.This method comprises also and offers a) interface of oscillograph that this interface is connected with oscillographic by detector, can read predetermined data from storer, and b) controller, this controller can be adjusted the oscillograph frequency response.102 these steps of expression at accompanying drawing 3.
According to the best approach of the present invention, the data that oscillograph needs by interface inquiry detector, and detector responds this needs by interface, provides to be stored in the data of storing in the detector internal storage system.104 and 106 these steps of expression at accompanying drawing 3.At last, this method comprises that the frequency response of automatic adjustment oscillograph compensates the Characteristics of detector frequency response, and Yu Ding total system frequency response becomes oscillograph and the Characteristics of detector that is connected thus.108 these steps of expression of accompanying drawing 3.
Beneficial effect of the present invention comprises:
1) when not using detector, oscillograph can directly be adjusted into a 3dB in its specific bandwidth.This has just optimized distortion, transient response and noisiness.When connecting detector, only add that necessary peak regulation number keeps system bandwidth to keep optimum transient response simultaneously.
2) if use detector than oscillograph low speed, oscillograph can determine the bandwidth that reduces it as much as possible to make this noise minimum that does not match and cause.
3) no matter whether oscillograph compensates detector, oscillograph is understood the system bandwidth that is connected with detector, and this number can be sent to the user, display or network computer display screen for example by linking to each other with oscillograph, or any other comprises the appropriate device of acoustic signal and printout.
4) owing to be stored in the form unanimity of the different information in the detector, the oscillograph in any future can be designed to and current detector work, any current oscillograph can with detector work in the future.
At last, to one skilled in the art, obviously here describe and the method and apparatus of the present invention that illustrates can combine or hardware or other combining form that is fit to realize by software, software and hardware.Preferably, this method and apparatus is realized by software, its objective is and lowers cost and have dirigibility.Therefore, to one skilled in the art, obvious method and apparatus of the present invention can realize that these instruction storage are used for carrying out and carry out by any suitable instruction processing unit by executing instruction in computing machine or microprocessor in computer-readable medium.Can select embodiment within the spirit and scope of the present invention.
In most preferred embodiment, describe and principle of the present invention has been described, it will be obvious to those skilled in the art that in details and arrange and to make amendment to the present invention, do not break away from this principle.Any change is all in the spirit and scope of appending claims.
Claims (12)
1. the sensitive detector equipment that uses with oscillograph, this detector comprises:
The housing of probe tip and the continuous electronic component with characteristic frequency response thereof is installed;
Be positioned at the first memory of housing, described first memory is the tentation data of the description of this characteristic frequency response at least with processor readable format storage representation; And
Interface between described first memory and oscillograph;
The oscillograph that described first memory response cooperates with described detector sends described predetermined data by described interface to oscillograph;
Wherein said tentation data comprises the complex data point, and the representative of each complex data point is in the frequency characteristic along described probe tip on the frequency of frequency spectrum regulation and continuous electronic component thereof;
Wherein said probe tip and continuous electronic component thereof also comprise composite transferring characteristic and compound output emissivity, and wherein said tentation data is also represented the description of this composite transferring characteristic and this compound output reflection.
2. detector device as claimed in claim 1 also comprises:
Be positioned at the controller of oscillograph, described controller comprises a processor and a second memory, the oscillograph that the response of described processor cooperates with described detector, by the tentation data of described interface reception transmission and with identical content stores in described second memory.
3. detector as claimed in claim 2, wherein said controller are adjusted the characteristic frequency response that oscillographic frequency response compensates described detector and continuous electronic component thereof after receiving and storing the tentation data of described transmission.
4. detector as claimed in claim 2, wherein said controller sends the oscillograph frequency response to the user after receiving and storing the tentation data of described transmission.
5. detector device as claimed in claim 4, wherein said controller sends to the user by display.
6. detector device as claimed in claim 1, wherein said first memory is a ROM (read-only memory).
7. detector device as claimed in claim 1, wherein said first memory is also stored to contain at least with the processor readable format and is stored in the title that the complex data in the described first memory is counted out, and wherein said first memory also sent title by described interface to oscillograph before sending described tentation data by described interface.
8. detector device as claimed in claim 7, wherein said first memory is a ROM (read-only memory).
9. detector device as claimed in claim 1, wherein said interface are synchronous and comprise a clock cable.
10. detector device as claimed in claim 9, wherein said interface comprise the complex data signal wire that connects detector corresponding to plural number.
11. detector device as claimed in claim 9, wherein said interface comprise a look-at-me line.
12. detector device as claimed in claim 11, wherein said interface comprise plural look-at-me line, the described plural look-at-me line of each bar is corresponding to one of described complex data line.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/718,718 US6725170B1 (en) | 2000-11-22 | 2000-11-22 | Smart probe apparatus and method for automatic self-adjustment of an oscilloscope's bandwidth |
| US09/718718 | 2000-11-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1366185A CN1366185A (en) | 2002-08-28 |
| CN1217196C true CN1217196C (en) | 2005-08-31 |
Family
ID=24887207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN011338334A Expired - Lifetime CN1217196C (en) | 2000-11-22 | 2001-11-22 | Sensitive detector for automatically regulating band width of oscillograph and method of detecting |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6725170B1 (en) |
| EP (1) | EP1209472B1 (en) |
| JP (1) | JP4156826B2 (en) |
| KR (1) | KR100717204B1 (en) |
| CN (1) | CN1217196C (en) |
Families Citing this family (30)
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| US7308519B2 (en) * | 2003-01-31 | 2007-12-11 | Tektronix, Inc. | Communications bus management circuit |
| US7109728B2 (en) * | 2003-02-25 | 2006-09-19 | Agilent Technologies, Inc. | Probe based information storage for probes used for opens detection in in-circuit testing |
| US20040239309A1 (en) * | 2003-05-27 | 2004-12-02 | Barr Andrew Harvey | Remotely controllable oscilloscope |
| US20050185769A1 (en) * | 2004-02-25 | 2005-08-25 | Pickerd John J. | Calibration method and apparatus |
| US6977493B2 (en) * | 2004-03-11 | 2005-12-20 | Santronics, Inc. | Electrical power probe for testing and supplying power to electrical wiring and devices |
| US20060210022A1 (en) * | 2005-01-27 | 2006-09-21 | Kan Tan | Apparatus and method for processing acquired signals for arbitrary impedance loads |
| US20070041511A1 (en) * | 2005-01-27 | 2007-02-22 | Kan Tan | Apparatus and method for processing a signal under test for measuring the impedance of a device under test |
| US20070276622A1 (en) * | 2006-05-25 | 2007-11-29 | Pickerd John J | Calibration method and apparatus using a trigger signal synchronous with a signal under test |
| US20070276614A1 (en) * | 2006-05-25 | 2007-11-29 | Kan Tan | De-embed method for multiple probes coupled to a device under test |
| US7460983B2 (en) * | 2006-08-23 | 2008-12-02 | Tektronix, Inc. | Signal analysis system and calibration method |
| US20070273389A1 (en) * | 2006-05-25 | 2007-11-29 | Kan Tan | Apparatus and method for processing a signal under test using a trigger signal synchronous with the signal under test for arbitrary impedance loads |
| US7408406B2 (en) * | 2006-05-24 | 2008-08-05 | Tektronix, Inc. | Mode selection amplifier circuit usable in a signal acquisition probe |
| US7660685B2 (en) * | 2006-08-02 | 2010-02-09 | Lecroy Corporation | Virtual probing |
| US7405575B2 (en) * | 2006-08-23 | 2008-07-29 | Tektronix, Inc. | Signal analysis system and calibration method for measuring the impedance of a device under test |
| US7414411B2 (en) * | 2006-08-23 | 2008-08-19 | Tektronix, Inc. | Signal analysis system and calibration method for multiple signal probes |
| US7408363B2 (en) * | 2006-08-23 | 2008-08-05 | Tektronix, Inc. | Signal analysis system and calibration method for processing acquires signal samples with an arbitrary load |
| CN101413967B (en) * | 2007-10-15 | 2011-06-15 | 英业达股份有限公司 | Method for controlling automatic measurement of oscilloscope |
| KR100949939B1 (en) * | 2008-03-28 | 2010-03-30 | 주식회사 한영넉스 | Paper recoder |
| DE102008035374A1 (en) * | 2008-06-06 | 2009-12-10 | Rohde & Schwarz Gmbh & Co. Kg | System for measuring high-frequency signals with standardized power supply and data interface |
| US9075696B2 (en) * | 2009-03-09 | 2015-07-07 | Tektronix, Inc. | Apparatus and method for performing burst triggering in a test and measurement instrument |
| US9140723B2 (en) * | 2010-10-01 | 2015-09-22 | Tektronix, Inc. | Signal acquisition probe storing compressed or compressed and filtered time domain impulse or step response data for use in a signal measurement system |
| CN102565478A (en) * | 2010-12-30 | 2012-07-11 | 鸿富锦精密工业（深圳）有限公司 | Oscilloscope data processing system and method |
| CN103364599B (en) * | 2012-03-29 | 2017-12-22 | 北京普源精电科技有限公司 | Probe, signal acquiring system and method with attenuation function |
| US9194888B2 (en) | 2012-10-11 | 2015-11-24 | Tektronix, Inc. | Automatic probe ground connection checking techniques |
| US20150084660A1 (en) * | 2013-09-25 | 2015-03-26 | Tektronix, Inc. | Time-domain reflectometer de-embed probe |
| US9209593B2 (en) * | 2013-12-18 | 2015-12-08 | Tektronix, Inc. | Method of controlling electro-optical probe gain and sensitivity |
| US9772391B2 (en) | 2014-01-24 | 2017-09-26 | Tektronix, Inc. | Method for probe equalization |
| US10768211B2 (en) | 2017-08-25 | 2020-09-08 | Oracle International Corporation | System and method for current sense resistor compensation |
| US10886588B2 (en) | 2018-09-26 | 2021-01-05 | Keysight Technologies, Inc. | High dynamic range probe using pole-zero cancellation |
| CN113625032A (en) * | 2021-07-01 | 2021-11-09 | 普源精电科技股份有限公司 | Probe measurement system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4070615A (en) * | 1976-05-12 | 1978-01-24 | Tektronix, Inc. | Compensation indicator for attenuation probe |
| DE3116690C2 (en) * | 1981-04-28 | 1983-09-15 | Rohde & Schwarz GmbH & Co KG, 8000 München | Device for measuring physical quantities |
| FR2537272B1 (en) | 1982-12-03 | 1986-04-04 | Solomat Sa | MULTI-PROBE MEASURING APPARATUS |
| US4672306A (en) * | 1985-04-08 | 1987-06-09 | Tektronix, Inc. | Electronic probe having automatic readout of identification and status |
| US5691635A (en) * | 1996-01-29 | 1997-11-25 | Fluke Corporation | Probe identification system for a measurement instrument |
| US5978742A (en) * | 1997-04-04 | 1999-11-02 | Tektronix, Inc. | Method and apparatus for digital sampling of electrical waveforms |
| US6321171B1 (en) * | 1998-04-03 | 2001-11-20 | Tektronix, Inc. | Electronic measurement instrument probe accessory offset, gain, and linearity correction method |
| US6351112B1 (en) | 1998-08-31 | 2002-02-26 | Agilent Technologies, Inc. | Calibrating combinations of probes and channels in an oscilloscope |
| US6111677A (en) * | 1998-08-31 | 2000-08-29 | Sony Corporation | Optical remote control interface system and method |
-
2000
- 2000-11-22 US US09/718,718 patent/US6725170B1/en not_active Expired - Lifetime
-
2001
- 2001-11-12 EP EP01309532A patent/EP1209472B1/en not_active Expired - Lifetime
- 2001-11-20 JP JP2001354918A patent/JP4156826B2/en not_active Expired - Lifetime
- 2001-11-22 KR KR1020010072976A patent/KR100717204B1/en active IP Right Grant
- 2001-11-22 CN CN011338334A patent/CN1217196C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1209472B1 (en) | 2011-10-26 |
| US6725170B1 (en) | 2004-04-20 |
| KR20020040604A (en) | 2002-05-30 |
| CN1366185A (en) | 2002-08-28 |
| EP1209472A2 (en) | 2002-05-29 |
| EP1209472A3 (en) | 2003-01-15 |
| JP2002202325A (en) | 2002-07-19 |
| JP4156826B2 (en) | 2008-09-24 |
| KR100717204B1 (en) | 2007-05-11 |
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